14
Operating Configurations
The 12 possible configurations are demonstrated thereinafter. Every solar energy exploitation
configuration is accompanied by a short description containing the all the essential constitutive
elements as stores, collectors, probes, pumps etc.
A small table gives at a glance the virtual devices for this configuration. The right column shows the
relay in which act upon the respective virtual device. The left column shows the temperature sensors
from which this device acquires the temperature. The sequence of the sensors is also important. The
two columns in the middle shows the name of the virtual devices (differential thermostats or simple
thermostat) and the way they act to the relays.
Examine for instance the following:
S1
DT-1
R1
S2
S3
DT-2
R2
S2
In the selected configuration only the DT-1 and DT-2 differential thermostats are used. The DT-1 obtain
temperature measurements from S1 and S2 and act directly to the R1 relay. The same is happening for
DT-2. Now the sensors involved are the S3,S2. The direct arrows indicate that the devices act to the
relays as two absolutely independent units.
Lets now examine at the next table.
S1
DT-1
R1
S2
S1
DT-2
R2
S3
S1
DT-3
R3
S4
The table indicates that now three differential thermostats are present. The straight arrows have been
replaced by a crossed one. This symbol indicates that according to the value SEL of the submenu
Logic a parallel or sequential charge can be chosen. As has already been explained the three
differential thermostats can function independently or not as desired.
In configurations 4, 5,6, 9 the issue of the charging priority can be introduced. Of those four only
in 6 and 9 it is possible to change the charging method through the Logic submenu and thus
selecting the sequential or the parallel technique. In the rest two (4, 5) the upper level of 4
configuration and the leftmost store of configuration 5 has always higher priority. In other words
the priority belongs to the place where the S2 has been installed. For the 4 and 5 configurations
the Anti-ice protection is always performed again to the upper level and to the left most store.
Finally in the configurations 4 and 5 the Collector Cooling and Reverse Store Cooling functions
are performed with priority to the lower store level and the right store respectively.
The arrows placed near the piping shows the energy transfer direction who takes place always from the
hotter to the cooler object.
Configuration #
1
Simple solar system.
1 Collector, 1 Store, 1 Pump, 2 Sensors
R1
Configuration #
2
Solar system with two serially connected stores.
1 Collector, 2 Stores, 2 Pumps, 4 Sensors
R1
R2
S1
DT-1
R1
S2
S1
DT-1
R1
S2
S3
DT-2
R2
S4
